/*
 *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#ifndef WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_ANDROID_VIDEO_RENDER_OPENGLES20_H_
#define WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_ANDROID_VIDEO_RENDER_OPENGLES20_H_

#include "video_render_defines.h"

#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>

namespace webrtc
{

class VideoRenderOpenGles20
{
public:
    VideoRenderOpenGles20(WebRtc_Word32 id);
    ~VideoRenderOpenGles20();

    WebRtc_Word32 Setup(WebRtc_Word32 widht, WebRtc_Word32 height);
    WebRtc_Word32 Render(const VideoFrame& frameToRender);
    WebRtc_Word32 SetCoordinates(WebRtc_Word32 zOrder,
                                 const float left,
                                 const float top,
                                 const float right,
                                 const float bottom);

private:
    void printGLString(const char *name, GLenum s);
    void checkGlError(const char* op);
    GLuint loadShader(GLenum shaderType, const char* pSource);
    GLuint createProgram(const char* pVertexSource,
                         const char* pFragmentSource);
    void SetupTextures(const VideoFrame& frameToRender);
    void UpdateTextures(const VideoFrame& frameToRender);

    WebRtc_Word32 _id;
    GLuint _textureIds[3]; // Texture id of Y,U and V texture.
    GLuint _program;
    GLuint _vPositionHandle;
    GLsizei _textureWidth;
    GLsizei _textureHeight;

    GLfloat _vertices[20];
    static const char g_indices[];

    static const char g_vertextShader[];
    static const char g_fragmentShader[];

};

} //namespace webrtc

#endif // WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_ANDROID_VIDEO_RENDER_OPENGLES20_H_
